Rialto
Siena

Castel Monastero

Rialto Score 8+

A Leading Hotels Of The World hotel. Rialto is a Virtuoso agency: book this hotel direct at the VIP rate for benefits that can include priority room upgrades, hotel credits, and more.

An 11th-century walled hamlet surrounded by vineyards and olive groves, Castel Monastero transports guests to another place and time, with a transformative spa and much-touted restaurants by our resident executive chef. Its 68 individually appointed guest rooms and suites are rustically elegant, and the spa offers personalized programs to revitalize and detoxify. The annual chef’s table is extraordinary and not to be missed. The ancient wine cellar offers more relaxed repasts. Go bike riding, play golf or polo, join the kitchen team for an Italian cooking class, or take a hot-air balloon ride over the Tuscan hills.

Località Monastero D'Ombrone, 53019 Siena, Italy
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Castel Monastero

About Castel Monastero

Insider tip

Owning the "keys" of Siena and the surroundings traditions and unique experiences such as the Palio and Bocelli concert.

In the hotel’s own words

Castel Monastero is set in the Tuscan countryside and is surrounded by stunning landscapes of Chianti vineyards, chestnuts forests and long rows of cypress trees; Just 23 km from Siena and within easy reach of charming Tuscan villages. Once an XI century monastery and village, Castel Monastero has been beautifully restored to a refined Tuscan Retreat and SPA.

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Rooms & Villas

Each of the spacious and light-filled rooms and suites at Castel Monastero are located either around the piazza of the medieval monastery or in its hamlet and each has its own identity. Everyone a private retreat of refined and discreet luxury, our newly renovated suites are spacious, warm, light- filled, and large living spaces combining nature, comfort, and style.

Wellness & Spa

Much like the land that surrounds us, our 1500 square meters SPA MONASTERII is restorative and replenishing, a journey unto itself, rooted in the ancient wisdom of monastic herbal remedies and the healing properties of the earth. It’s a nourishing, calming experience merging ancient knowledge and techniques and modern therapies that draw upon the botanicals and other natural ingredients inspired by, and derived from, our land.

Next to 8 modern treatment rooms, the spa’s water world includes two indoor pools, one of which pairs high temperature with a high saline concentration for an extraordinary detox effect, Finnish sauna, Bio Sauna, Kneipp cure, Hammam, Pool with hydromassage, and multi-sensory showers.

Activities Castel Monastero offers its guests a wide range of open-air activities such as its own tennis court, located immediately outside the village or the swimming pools in front of the Spa. From guided tours, wine tasting, forest trekking, truffle hunts, and hot air balloon rides to yoga sessions, and cooking classes our team is here to tailor unique experiences specifically for your desires and needs.

Weddings Castel Monastero is a as romantic place as you could hope to find, and the ideal place to host your wedding or any other special celebration. The perfect venue for lovers of history, nature, fine dining, and unforgettable views, the hamlet can host up to 140 guests in-house and offers a multitude of beautiful locations, including our iconic square and the castle’s little church, which can also be used for a more intimate blessing of up to 40 people. We are happy to assist you in organizing every detail of your special day and stay.

VIP Hotel Program · Invitation-only

Book direct at the Virtuoso VIP rate, instantly

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A direct booking with the hotel, confirmed instantly on Rialto — no contact form or middleman. Hotel loyalty points and elite status apply where applicable.

Virtuoso is an invitation-only network of luxury travel agencies. VIP rates generally meet or beat the hotel's website rates and include this hotel's own Virtuoso amenities below.

  • Room upgrade on arrival, based on availability
  • Daily breakfast for two per bedroom
  • $100 hotel credit per stay
  • Early check-in and late check-out, based on availability

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Rooms and suites

6 room types, as described by the hotel.
Rooms
Size
1Double Superior
Offering a comfortable space, the Superior Room is ideal for two people and offers a large bedroom furnished in Tuscan country style. Historic materials and precious textiles create a warm, intimate atmosphere, and the bathroom is fitted with a bathtub and shower.
269–323 ft²
2Double Deluxe
The De Luxe Room is ideal for a couple and includes the possibility of adding a third bed or cot. The furnishings and materials create a warm atmosphere with their simple Tuscan brightness. Many of the bathrooms feature a separate bathtub and shower. Some bedrooms may be connecting.
344–484 ft²
3Prestige Room
A haven of absolute Tuscan refinement and elegance. Our Prestige Room offers a surface area divided into several spaces, including a bedroom and small lounge. It can host up to three guests, with the addition of a third bed or cot.
Members only
4Junior Suite
A magnificent environment divided into bedroom and a lounge, ideal for up to four guests. Rustic Tuscan style shines forth in every detail, along with its most refined materials, from ancient types of wood to terracotta and textiles. The bathroom also has a separate shower and bathtub.
Members only
Suites
Size
5Executive Suite
A magnificent apartment divided into bedroom and a large lounge. The most refined materials, textiles and details decorate every area with their rustic Tuscan charm. The bathroom has a separate shower and bathtub. The bedrooms may be adjoining or connecting.
Members only
6Royal Suite
A small haven, in complete harmony with the beauty of Castel Monastero. The suite is regal in size and is divided into bedrooms and a lounge, all bathed in a distinguished atmosphere. The elegance of the furnishings and materials highlights the history and taste of Tuscan tradition.
Members only

Room type data is subject to change and accuracy cannot be guaranteed.

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  1. 1Connect Rialto to Claude or ChatGPT: it is an MCP server, added from the connector settings in one step.
  2. 2Ask for Castel Monastero on your dates. The assistant returns live VIP, corporate and public rates with the benefits named per rate.
  3. 3Finish on a secure Rialto page. The booking is instant and direct with the hotel; card details never pass through the chat.

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Frequently Asked Questions

Does booking through Rialto cost more than booking with the hotel?

No - VIP rates under Virtuoso always meet or beat hotel's public, flexible rate, and provide valuable amenities and possible upgrades. Rialto also provides the hotel's non-VIP and corporate rates, so you can compare with full transparency.

Can my AI assistant book this hotel?

Yes. Connect Rialto to Claude or ChatGPT with our AI hotel booking MCP server and ask for rates. You finish the booking instantly on a secure Rialto page, direct with the hotel. Card details are not sent through the AI chat, so either you would approve the final checkout step and reconfirm all the information, or if you authorize your agent with Computer-Use permissions, it can fill out the checkout form as well.

What is the value of the VIP benefits?

Daily breakfast for two plus the $100 hotel credit come with every stay at this hotel - adding $100-200/day in value. A room upgrade could also be worth a substantial amount, in addition to early check-in / late check-out benefits when available.

What Virtuoso amenities does Castel Monastero include?

Booked through Rialto, a stay at Castel Monastero includes Room upgrade on arrival, based on availability; Daily breakfast for two per bedroom; $100 hotel credit per stay; Early check-in and late check-out, based on availability.

What room types does Castel Monastero offer?

Castel Monastero lists Double Superior, Double Deluxe, Prestige Room, Junior Suite, Executive Suite, Royal Suite. Sizes and bed options for each are in the rooms table above.

How does this compare to other programs, like through AMEX Fine Hotels & Resorts, or Chase Edit?

Using a hotel's own VIP program may provide higher upgrade priority, additional VIP benefits and promotional rate offers, and a direct relationship with the hotel for special requests. Rialto offers more VIP hotels than any credit card program. In addition, Chase Edit rates can be substantially more expensive as they rarely run promotions whereas AMEX rates are often comparable but do not offer programs such as Upgrade at Booking.

Rates are shown to members

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